Mixed practice, Revision 1 (Chapters 1 to 4)

Mixed data questions ask your child to choose what to read before deciding what to calculate. A table heading, a graph scale and a sentence about a total each supply a different kind of information. This page brings those reading decisions together with whole-number calculations. Its statistics foundation is the MOE Primary 4 work on completing tables and interpreting data, with each question determining which earlier number skills are needed.

• Separate the information printed in a table or graph from additional conditions in the question, so neither source is overlooked.
• Choose the relevant row, column or plotted reading by matching it to the group or time named in the question.
• Work out whether the task asks for one value, a combined quantity, a comparison or missing information recovered from a relationship.
• Use whole-number addition, subtraction, multiplication or division as the data require, rather than choosing an operation because it appeared in the previous question.
• Explain a conclusion with a labelled calculation or a direct reference to the readings that support it, retaining the appropriate unit.

For a question comparing two non-negative counts, your child's difference cannot exceed the larger count. Add that difference to the smaller count to check that the larger count is recovered, using the same two categories throughout.

This mixed set contains Intermediate questions throughout. The tasks combine selecting the best three scores, equal totals, a greatest-to-smallest difference, a hidden reading or a changing increase with a further calculation. Some finish with a money amount, while others ask for a shortfall or a comparison between categories. Before your child begins, ask what the final answer counts and which missing value must be found first. Keep recovered readings beside their day, month or stall name so the next operation uses the right information. A member can replay the solution film after an attempt if the link between the two stages is unclear. The free gardening-team card gives written steps for selecting the three scores and comparing their total with the prize requirement, providing a concrete way to review both decisions.

How is mixed data practice different from one graph lesson? The question can require several decisions without naming the method. Your child may need to interpret a heading, recover a value and then use it in a calculation. Reading the final request first helps establish the goal, while the working shows how the supplied data lead to it.

What should I do if my child calculates accurately but misreads the data? Return to the exact row, column or time used in the working. Ask your child to describe that entry in words and compare it with the requested group. Repeating the arithmetic will not settle a question whose starting values describe different categories from the ones being asked about.

Does every mixed question need several operations? No. Some information can be read directly, and recognising that is part of interpreting data. Encourage your child to write only the calculations the question needs. A short explanation identifying the relevant reading can be more appropriate than adding unnecessary steps to a direct comparison.